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ABOUT SHARKWARD   TYPES OF SENSORS   LIGHTING CONTROL STRATEGIES
 
          ABOUT SHARKWARD                              

Sharkward is a manufacturer which is most professional in energy savings since 2008, located in Ningbo, China. We offer a good variety of products to our customers, including without limitation: Microwave sensors, Pir sensors, dimming sensors, ceiling sensors, wall sensor switches, High Bay sensors, sensor lamps, dimming sensor lamps, emergency sensor lamps etc. which always meet the standard of ISO9001:2000 QMS,TUV,CE, SGS,EMC and ROHS, and are exported worldwide to EU, USA, Canada, Asia, Japan and South-East Asia etc. Our Partners are big or small wholesalers, retailers and LED factories. We always meet different requests about technology, packing and delivery time from different clients.

Sharkward Team is equipped with more than 10 experienced engineers to develop tools, machines, art works, software and hardware, and also with good management team to hold responsibility for the strategic focus of SHARKWARD. Besides, Sharkward always keep creating new models to provide the most efficient energy saving products. Technology is the most powerful tool of Sharkward to help you take control of your energy costs and your carbon footprint. Our target is 00.1W Power consumption.
 
 
          TYPES OF SENSORS                   

1.Passive Infrared (PIR)
Passive Infrared (PIR) is the most popular and widely applied sensing technology in the market today. The PIR sensor senses the presence and motions of occupant by detecting the change of infrared energy emitted from a warm object (human body or vehicle) in motion and the background space. Every PIR sensor is equipped with an optical device, generally a plastic lens with multiple segments called Fresnel lens, to collect the infrared energy emitted by the occupant to the infrared sensing component.

The Fresnel lens divides the detection coverage into multiple zones corresponding to the respective segments.PIR sensor requires an unobstructed line-of-sight for effective operation, therefore sensing performance is subject to the relative position between sensor and occupant. PIR sensors are more sensitive to the movements across the detection zones than toward or away the sensors. In general, the closer the occupant is to the sensor,the better the sensor could detect minor motion

2.MICROWAVE SENSOR (MV)

High Frequency Doppler technology senses the presence and motions of occupant by detecting the frequency shift bounced back from a moving object. The operation principle of MV sensor is Doppler Effect which uses high frequency radio waves 5.8GHz to detect the object movement. The MV sensor does not require openings on the front cover like conventional ultrasonic sensor, which have been considered negative factors for interior d¨¦cor,sensor operation,high moisture application, vandalism prevention,and facility management.

MV sensors are better at detecting minor motions (e.g. typing, reading) and do not require an unobstructed line-of-sight placement like PIR sensors,thus making them more suitable for applications such as an ffice with partitions,a library with cubicles or a restroom with stalls.

3.Application Notes

¡ñ Avoid placing the MV sensors within 1 meter of fluorescent lighting fixture as this may cause false detection.
¡ñ Avoid sensor placement facing doors, corridors or exits as MV sensors may detect the traffics at adjacent areas.
¡ñ MV sensors are best for use in areas with partitions and high dividers, or high level of minor motion activities.
¡ñ On the contrary with PIR sensors, the MV sensors are more sensitive to the movements ¡°toward¡± than ¡°across¡± the sensor.

4.Ultrasonic Sensor£¨UTS)

Ultrasonic sensors emit an inaudible sound pattern and then ¡°read¡± the reflection. This sound is above the range of human hearing. A break in the pattern caused by any motion in the area triggers the control. Ultrasonic sensors can ¡°see¡± around obstructions and are best for areas with cabinets and shelving,restrooms and open areas requiring 360-degree coverage


5.Application Notes£º

Best for areas with cabinets and shelving,restrooms and open areas requiring 360-degree coverage.

6.Occupancy Sensing Technology Matrix



          LIGHTING CONTROL STRATEGIES               

Lighting control strategies refer to the types of sensing and switching/dimming control that will be used to meet the requirements. Applying proper control strategies is the key to deliver a successful lighting control project with high level of occupant satisfaction by taking their needs into account, while ensuring compliance with mandatory energy codes and maximum energy savings.

1.OCCUPANCY SENSING CONTROL FOR ON/OFF
Occupancy Sensing Control typically refers to the use of an OCCUPANCY SENSOR that will automatically turn lights on when it detects the presence of an occupant, and automatically turn lights off after the area is vacated for a period of time normally adjustable via setting. This control strategy is considered the most convenient and popular in many applications, especially the areas for public use, since the users never have to operate the control devices. Occupancy sensor may be described as ¡°presence detector/sensor¡± in Europe.


2.VACANCY SENSING CONTROL FOR ON/OFF
Vacancy Sensing Control typically refers to the use of a VACANCY SENSOR that will require the occupant to manually turn on the lights if needed, and sensor will automatically turn lights off after the area is vacant and delay time elapses. This strategy is proven with enhanced energy savings because occupants are less likely to turn the lights on when temporarily entering a space, or passing a corridor if certain light level is available.The latest energy codes in California, Title 24 requires using vacancy sensors in more spaces,especially the


3.Daylight harvesting control
Daylight Sensing Control typically refers to the use of a DAYLIGHT SENSOR to inhibit or dim the electric lights in a daylight area by sensing the available natural light. The principle is simple,an ambient light sensor,some may refer it as photocell sensor, measures either the level of daylight contribution or the overall combined natural and electric light as the key component of dimming or switching the controlled lights in one or multiple zones to achieve an optimal lighting level based on pre-determined parameters.

The Daylight Sensing Control, some may refer to Daylight Harvesting, is an effective control strategy for spaces with ample daylight to save lighting energy up to 60%, and also increases the quality of visual environment. Other benefits of daylight sensing control including helps reduce operating cost while improving user satisfaction, meets the mandatory requirements of energy codes, and contributes to obtaining points in several LEED credits categories.


4.Bi-level control



5.Bi-level control with daylight Control
Bi-level control is an ideal control strategy with proven performance in energy savings, while still maintaining certain level of lighting for public safety and comfort. This control strategy requires using a bi-level occupancy/vacancy sensor that will keep the dimmable lighting at a low-dim level or non-dimmable lighting partial on during vacancy period or nighttime, instead of complete shutoff. offers variety types of occupancy sensors with various control modes selectable for bi-level control.


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